Contact filing device



Jan. 16,1940. H. WILSON 2,187,292

CONTACT FILING DEVICE I Filed March 12, 1937 v I INVENTOR T a- HOWARD WILSON BY HIS- ATTORNEYS I the same hand which separates the points for inserting the guide.

What I claim is:

1. A device for filing contact points which are urged together, comprising in combination, a guide and a member slidable relative thereto and having an abrasive surface, said guide being constructed and arranged to confine said member to rectilinear movement with respect to said guide, said guide having a lateral aperture intermediate its ends and in the path of said member a'nd adapted to engage one of said con tact points, when both said guide and member are inserted between said points, whereby said contact point cooperates with said guide to retain said member between said points. 7

2. A device for filing contact points which are urged together, comprising in. combination, a guide and a member mounted thereon 'forre ciprocation relative thereto, said guide'having means for confining said member to rectilinear movement, said member having an abrasive surface, and said guide having a lateral aperture of less width than said abrasive surface in a direction transverse to the path thereof, and

adapted to receive one of said contact points when both said guide and member are inserted between said points to hold said guide and member transverse to said points.

3. Adevice for filing contact points whichare urged together, comprising in combination, a

guide and an element slidably mounted relative receiving said member for reciprocation with respect thereto, and means on said guide for engaging the point to be abraded for holding the same transverse to thepath of said reciprocation and preventing radialimovement of said guide in all directionswhile permitting pivotal movement thereof with respect to said pointto be abraded.

'5. A device for filing contact points which are urged together, comprising in combination, a guide and a member slidable in rectilinear reciprocation thereon having at one end an abrasive surface, said guide having in its end corresponding to said abrasive surface an aperture of less width than said abrasive surface in a direction transverse to the path thereof and adapted to receive and engage one of said contact points'when said abrasive surface is inserted between said points.

6. A device for filing contact points whichare urged together, comprising a guide and a file slidable in rectilinear reciprocation relative thereto, said guide having a lateral aperture no wider than the path of said file adapted to receive one of said contact points when both said guide and file are inserted between said points,

guide to retain said file between said points.

7. A device for filing contact points which are urged together, comprising a file blade having a stem, in combination with a guide having a sleeve slidably receiving said stem for rectilinear reciprocation therein and a substantially fiat portion having a central aperture constructed and arranged to engage one of said contact points when both said guide and. file are inserted between said points, and thereby retain said file blade in contact therewith.

. 8. A device of the character described, comprising a file having a blade and a stem said blade being wider than said stem, incombination with a guide, having a sleeve slidably receiving said stem, said sleeve having one end slotted to receive said blade, and saidguide having a portion opposite said blade and constructed and arranged to engage the element to be filed and thereby retain said file blade in contact there.- with.

9. A device for filingcontact points which are urged together, comprising in combination, an

abrasive member comprising a stem and a file blade, and a guide comprising a sleeve slidably receiving said stem for rectilinear reciprocation therein and a substantially flat portion having an aperture no wider than said file blade constructed andarranged to engage one of said contact points when both said flat guide portion and said file blade are inserted between said points so as to cooperate with said sleeve to retain said file blade in engagement withthe said contact.

I 10. A guide blade and an abrasive blade in parallel substantially contacting relation, said guide blade being provided with an aperture, and means confining the movement of said abrasive blade toa direction radial to said aperture, comprising a stem part of said abrasive blade passing through a retainer part of said guide.

11. A guide and a member slidably mounted thereon and having an abrasive surface means on said guide slidably retaining said member for rectilinear reciprocation therein, said guide having a substantially fiat blade parallel to said surface and provided with an aperture adapted to engage and encircle the element to be abraded, said blade and abrasive surface being removable together from the element to be abraded.

12. A device for filing contact points which are urged together, comprising in combination, a guide and an element slidably mounted relative thereto, said guide comprisinga single piece of sheet metal of a width less than half its length, said member having an'abrasive surface, said guide having an'aperture adapted to receive one of said contact points when both said guide and abrasive surface are inserted between said points, the guide having means confining said member to substantially rectilinear movement and stop means for the member cooperating with the guide for limiting the. rectilinear movement of the member to prevent movement of said abrasive surface clear of said aperture.

: .I-IOWARD WILSON.

whereby said contact point cooperates with said 

